BioStacks
Best PS for Stress & Mood
Top 3 products ranked
Last reviewed May 2026
Clinical dose: 300–800 mg
Why PS for Stress & Mood
PS plays a supporting role in stress & mood. Phosphatidylserine is a phospholipid concentrated in brain cell membranes. RCTs show it can blunt cortisol response to physical and mental stress at 400–800 mg/day.
What dose to look for
Clinical studies typically use 300–800 mg of ps. 400 mg minimum effective dose in cortisol-blunting RCTs; 300 mg allows partial credit on dose curve. Products below this range may not deliver meaningful results.
What the research says
PS has moderate clinical evidence for stress & mood benefits. Several clinical trials show cortisol-blunting effects at 400-800mg/day under stress conditions Learn more
Clinical research on Phosphatidylserine (PS)
MODERATE — Consistent cortisol-blunting · 300–800 mg/day (400 mg minimum effective dose)
- •2014 RCT (75 men): 400 mg normalized cortisol response (p=0.043). Critically, 200 mg had NO effect — dose threshold is real.
- •2008 exercise RCT: 600 mg/day reduced cortisol AUC by 35% (p<0.01) and increased testosterone by 37% (p=0.02).
- •Consistent cortisol-blunting across studies, but 400 mg minimum dose means many products are underdosed at 100–200 mg.
- •Optimal form: soy-derived PS, often combined with phosphatidic acid or omega-3. Mechanism: blunts HPA axis, reduces cortisol and ACTH.
